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 A235261 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise 3
 256, 2400, 2400, 22500, 75744, 22500, 162000, 2691067, 2691067, 162000, 1166400, 64470056, 417967682, 64470056, 1166400, 7157160, 1538378437, 41170730836, 41170730836, 1538378437, 7157160, 43917129, 27988093692, 3998547995093 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .....256........2400...........22500..............162000..............1166400 ....2400.......75744.........2691067............64470056...........1538378437 ...22500.....2691067.......417967682.........41170730836........3998547995093 ..162000....64470056.....41170730836......16811907001604.....6760603592133043 .1166400..1538378437...3998547995093....6760603592133043.11272050100248562624 .7157160.27988093692.282203684810984.1943970843613005622 LINKS R. H. Hardin, Table of n, a(n) for n = 1..49 FORMULA Empirical for column k: k=1: [linear recurrence of order 40] EXAMPLE Some solutions for n=2 k=4 ..0..0..2..0..2....0..0..0..1..3....0..0..0..2..2....0..0..2..2..2 ..1..0..2..0..3....1..0..1..0..0....0..0..2..0..3....0..0..1..0..3 ..1..0..3..2..0....2..0..3..0..0....0..0..3..3..3....1..0..1..0..1 CROSSREFS Column 1 is A204303 Sequence in context: A205020 A204309 A235416 * A236087 A204303 A236083 Adjacent sequences: A235258 A235259 A235260 * A235262 A235263 A235264 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Jan 05 2014 STATUS approved

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Last modified December 1 05:26 EST 2023. Contains 367468 sequences. (Running on oeis4.)